mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Jan Engelhardt](/assets/img/avatar_default.png)
* Convert files to UTF-8. * Also correct some people's names (one example is Eißfeldt, which was found in a source file. Given that the author used an ß at all in a source file indicates that the real name has in fact a 'ß' and not an 'ss', which is commonly used as a substitute for 'ß' when limited to 7bit.) * Correct town names (Goettingen -> Göttingen) * Update Eberhard Mönkeberg's address (http://lkml.org/lkml/2007/1/8/313) Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Adrian Bunk <bunk@kernel.org>
870 lines
24 KiB
C
870 lines
24 KiB
C
/*
|
|
* Amiga Linux/m68k Ariadne Ethernet Driver
|
|
*
|
|
* © Copyright 1995-2003 by Geert Uytterhoeven (geert@linux-m68k.org)
|
|
* Peter De Schrijver (p2@mind.be)
|
|
*
|
|
* ---------------------------------------------------------------------------
|
|
*
|
|
* This program is based on
|
|
*
|
|
* lance.c: An AMD LANCE ethernet driver for linux.
|
|
* Written 1993-94 by Donald Becker.
|
|
*
|
|
* Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
|
|
* Advanced Micro Devices
|
|
* Publication #16907, Rev. B, Amendment/0, May 1994
|
|
*
|
|
* MC68230: Parallel Interface/Timer (PI/T)
|
|
* Motorola Semiconductors, December, 1983
|
|
*
|
|
* ---------------------------------------------------------------------------
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of the Linux
|
|
* distribution for more details.
|
|
*
|
|
* ---------------------------------------------------------------------------
|
|
*
|
|
* The Ariadne is a Zorro-II board made by Village Tronic. It contains:
|
|
*
|
|
* - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both
|
|
* 10BASE-2 (thin coax) and 10BASE-T (UTP) connectors
|
|
*
|
|
* - an MC68230 Parallel Interface/Timer configured as 2 parallel ports
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/init.h>
|
|
#include <linux/zorro.h>
|
|
#include <linux/bitops.h>
|
|
|
|
#include <asm/amigaints.h>
|
|
#include <asm/amigahw.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include "ariadne.h"
|
|
|
|
|
|
#ifdef ARIADNE_DEBUG
|
|
int ariadne_debug = ARIADNE_DEBUG;
|
|
#else
|
|
int ariadne_debug = 1;
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Macros to Fix Endianness problems
|
|
*/
|
|
|
|
/* Swap the Bytes in a WORD */
|
|
#define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00))
|
|
/* Get the Low BYTE in a WORD */
|
|
#define lowb(x) (x&0xff)
|
|
/* Get the Swapped High WORD in a LONG */
|
|
#define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
|
|
/* Get the Swapped Low WORD in a LONG */
|
|
#define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
|
|
|
|
|
|
/*
|
|
* Transmit/Receive Ring Definitions
|
|
*/
|
|
|
|
#define TX_RING_SIZE 5
|
|
#define RX_RING_SIZE 16
|
|
|
|
#define PKT_BUF_SIZE 1520
|
|
|
|
|
|
/*
|
|
* Private Device Data
|
|
*/
|
|
|
|
struct ariadne_private {
|
|
volatile struct TDRE *tx_ring[TX_RING_SIZE];
|
|
volatile struct RDRE *rx_ring[RX_RING_SIZE];
|
|
volatile u_short *tx_buff[TX_RING_SIZE];
|
|
volatile u_short *rx_buff[RX_RING_SIZE];
|
|
int cur_tx, cur_rx; /* The next free ring entry */
|
|
int dirty_tx; /* The ring entries to be free()ed. */
|
|
struct net_device_stats stats;
|
|
char tx_full;
|
|
};
|
|
|
|
|
|
/*
|
|
* Structure Created in the Ariadne's RAM Buffer
|
|
*/
|
|
|
|
struct lancedata {
|
|
struct TDRE tx_ring[TX_RING_SIZE];
|
|
struct RDRE rx_ring[RX_RING_SIZE];
|
|
u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
|
|
u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
|
|
};
|
|
|
|
static int ariadne_open(struct net_device *dev);
|
|
static void ariadne_init_ring(struct net_device *dev);
|
|
static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev);
|
|
static void ariadne_tx_timeout(struct net_device *dev);
|
|
static int ariadne_rx(struct net_device *dev);
|
|
static void ariadne_reset(struct net_device *dev);
|
|
static irqreturn_t ariadne_interrupt(int irq, void *data);
|
|
static int ariadne_close(struct net_device *dev);
|
|
static struct net_device_stats *ariadne_get_stats(struct net_device *dev);
|
|
#ifdef HAVE_MULTICAST
|
|
static void set_multicast_list(struct net_device *dev);
|
|
#endif
|
|
|
|
|
|
static void memcpyw(volatile u_short *dest, u_short *src, int len)
|
|
{
|
|
while (len >= 2) {
|
|
*(dest++) = *(src++);
|
|
len -= 2;
|
|
}
|
|
if (len == 1)
|
|
*dest = (*(u_char *)src)<<8;
|
|
}
|
|
|
|
|
|
static int __devinit ariadne_init_one(struct zorro_dev *z,
|
|
const struct zorro_device_id *ent);
|
|
static void __devexit ariadne_remove_one(struct zorro_dev *z);
|
|
|
|
|
|
static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = {
|
|
{ ZORRO_PROD_VILLAGE_TRONIC_ARIADNE },
|
|
{ 0 }
|
|
};
|
|
|
|
static struct zorro_driver ariadne_driver = {
|
|
.name = "ariadne",
|
|
.id_table = ariadne_zorro_tbl,
|
|
.probe = ariadne_init_one,
|
|
.remove = __devexit_p(ariadne_remove_one),
|
|
};
|
|
|
|
static int __devinit ariadne_init_one(struct zorro_dev *z,
|
|
const struct zorro_device_id *ent)
|
|
{
|
|
unsigned long board = z->resource.start;
|
|
unsigned long base_addr = board+ARIADNE_LANCE;
|
|
unsigned long mem_start = board+ARIADNE_RAM;
|
|
struct resource *r1, *r2;
|
|
struct net_device *dev;
|
|
struct ariadne_private *priv;
|
|
int err;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960");
|
|
if (!r1)
|
|
return -EBUSY;
|
|
r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM");
|
|
if (!r2) {
|
|
release_resource(r1);
|
|
return -EBUSY;
|
|
}
|
|
|
|
dev = alloc_etherdev(sizeof(struct ariadne_private));
|
|
if (dev == NULL) {
|
|
release_resource(r1);
|
|
release_resource(r2);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv = netdev_priv(dev);
|
|
|
|
r1->name = dev->name;
|
|
r2->name = dev->name;
|
|
|
|
dev->dev_addr[0] = 0x00;
|
|
dev->dev_addr[1] = 0x60;
|
|
dev->dev_addr[2] = 0x30;
|
|
dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff;
|
|
dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff;
|
|
dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
|
|
dev->base_addr = ZTWO_VADDR(base_addr);
|
|
dev->mem_start = ZTWO_VADDR(mem_start);
|
|
dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE;
|
|
|
|
dev->open = &ariadne_open;
|
|
dev->stop = &ariadne_close;
|
|
dev->hard_start_xmit = &ariadne_start_xmit;
|
|
dev->tx_timeout = &ariadne_tx_timeout;
|
|
dev->watchdog_timeo = 5*HZ;
|
|
dev->get_stats = &ariadne_get_stats;
|
|
dev->set_multicast_list = &set_multicast_list;
|
|
|
|
err = register_netdev(dev);
|
|
if (err) {
|
|
release_resource(r1);
|
|
release_resource(r2);
|
|
free_netdev(dev);
|
|
return err;
|
|
}
|
|
zorro_set_drvdata(z, dev);
|
|
|
|
printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address "
|
|
"%s\n", dev->name, board,
|
|
print_mac(mac, dev->dev_addr));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ariadne_open(struct net_device *dev)
|
|
{
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
u_short in;
|
|
u_long version;
|
|
int i;
|
|
|
|
/* Reset the LANCE */
|
|
in = lance->Reset;
|
|
|
|
/* Stop the LANCE */
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = STOP;
|
|
|
|
/* Check the LANCE version */
|
|
lance->RAP = CSR88; /* Chip ID */
|
|
version = swapw(lance->RDP);
|
|
lance->RAP = CSR89; /* Chip ID */
|
|
version |= swapw(lance->RDP)<<16;
|
|
if ((version & 0x00000fff) != 0x00000003) {
|
|
printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n");
|
|
return -EAGAIN;
|
|
}
|
|
if ((version & 0x0ffff000) != 0x00003000) {
|
|
printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part "
|
|
"number = %ld)\n", (version & 0x0ffff000)>>12);
|
|
return -EAGAIN;
|
|
}
|
|
#if 0
|
|
printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
|
|
(version & 0xf0000000)>>28);
|
|
#endif
|
|
|
|
ariadne_init_ring(dev);
|
|
|
|
/* Miscellaneous Stuff */
|
|
lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */
|
|
lance->RDP = 0x0000;
|
|
lance->RAP = CSR4; /* Test and Features Control */
|
|
lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
|
|
|
|
/* Set the Multicast Table */
|
|
lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
|
|
lance->RDP = 0x0000;
|
|
lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
|
|
lance->RDP = 0x0000;
|
|
lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
|
|
lance->RDP = 0x0000;
|
|
lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
|
|
lance->RDP = 0x0000;
|
|
|
|
/* Set the Ethernet Hardware Address */
|
|
lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */
|
|
lance->RDP = ((u_short *)&dev->dev_addr[0])[0];
|
|
lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */
|
|
lance->RDP = ((u_short *)&dev->dev_addr[0])[1];
|
|
lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */
|
|
lance->RDP = ((u_short *)&dev->dev_addr[0])[2];
|
|
|
|
/* Set the Init Block Mode */
|
|
lance->RAP = CSR15; /* Mode Register */
|
|
lance->RDP = 0x0000;
|
|
|
|
/* Set the Transmit Descriptor Ring Pointer */
|
|
lance->RAP = CSR30; /* Base Address of Transmit Ring */
|
|
lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
|
|
lance->RAP = CSR31; /* Base Address of transmit Ring */
|
|
lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
|
|
|
|
/* Set the Receive Descriptor Ring Pointer */
|
|
lance->RAP = CSR24; /* Base Address of Receive Ring */
|
|
lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
|
|
lance->RAP = CSR25; /* Base Address of Receive Ring */
|
|
lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
|
|
|
|
/* Set the Number of RX and TX Ring Entries */
|
|
lance->RAP = CSR76; /* Receive Ring Length */
|
|
lance->RDP = swapw(((u_short)-RX_RING_SIZE));
|
|
lance->RAP = CSR78; /* Transmit Ring Length */
|
|
lance->RDP = swapw(((u_short)-TX_RING_SIZE));
|
|
|
|
/* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
|
|
lance->RAP = ISACSR2; /* Miscellaneous Configuration */
|
|
lance->IDP = ASEL;
|
|
|
|
/* LED Control */
|
|
lance->RAP = ISACSR5; /* LED1 Status */
|
|
lance->IDP = PSE|XMTE;
|
|
lance->RAP = ISACSR6; /* LED2 Status */
|
|
lance->IDP = PSE|COLE;
|
|
lance->RAP = ISACSR7; /* LED3 Status */
|
|
lance->IDP = PSE|RCVE;
|
|
|
|
netif_start_queue(dev);
|
|
|
|
i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED,
|
|
dev->name, dev);
|
|
if (i) return i;
|
|
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = INEA|STRT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void ariadne_init_ring(struct net_device *dev)
|
|
{
|
|
struct ariadne_private *priv = netdev_priv(dev);
|
|
volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start;
|
|
int i;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
priv->tx_full = 0;
|
|
priv->cur_rx = priv->cur_tx = 0;
|
|
priv->dirty_tx = 0;
|
|
|
|
/* Set up TX Ring */
|
|
for (i = 0; i < TX_RING_SIZE; i++) {
|
|
volatile struct TDRE *t = &lancedata->tx_ring[i];
|
|
t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i]));
|
|
t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) |
|
|
TF_STP | TF_ENP;
|
|
t->TMD2 = swapw((u_short)-PKT_BUF_SIZE);
|
|
t->TMD3 = 0;
|
|
priv->tx_ring[i] = &lancedata->tx_ring[i];
|
|
priv->tx_buff[i] = lancedata->tx_buff[i];
|
|
#if 0
|
|
printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i,
|
|
&lancedata->tx_ring[i], lancedata->tx_buff[i]);
|
|
#endif
|
|
}
|
|
|
|
/* Set up RX Ring */
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
volatile struct RDRE *r = &lancedata->rx_ring[i];
|
|
r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i]));
|
|
r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) |
|
|
RF_OWN;
|
|
r->RMD2 = swapw((u_short)-PKT_BUF_SIZE);
|
|
r->RMD3 = 0x0000;
|
|
priv->rx_ring[i] = &lancedata->rx_ring[i];
|
|
priv->rx_buff[i] = lancedata->rx_buff[i];
|
|
#if 0
|
|
printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i,
|
|
&lancedata->rx_ring[i], lancedata->rx_buff[i]);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
|
|
static int ariadne_close(struct net_device *dev)
|
|
{
|
|
struct ariadne_private *priv = netdev_priv(dev);
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
lance->RAP = CSR112; /* Missed Frame Count */
|
|
priv->stats.rx_missed_errors = swapw(lance->RDP);
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
|
|
if (ariadne_debug > 1) {
|
|
printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
|
|
dev->name, lance->RDP);
|
|
printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name,
|
|
priv->stats.rx_missed_errors);
|
|
}
|
|
|
|
/* We stop the LANCE here -- it occasionally polls memory if we don't. */
|
|
lance->RDP = STOP;
|
|
|
|
free_irq(IRQ_AMIGA_PORTS, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline void ariadne_reset(struct net_device *dev)
|
|
{
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = STOP;
|
|
ariadne_init_ring(dev);
|
|
lance->RDP = INEA|STRT;
|
|
netif_start_queue(dev);
|
|
}
|
|
|
|
|
|
static irqreturn_t ariadne_interrupt(int irq, void *data)
|
|
{
|
|
struct net_device *dev = (struct net_device *)data;
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
struct ariadne_private *priv;
|
|
int csr0, boguscnt;
|
|
int handled = 0;
|
|
|
|
if (dev == NULL) {
|
|
printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
|
|
if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
|
|
return IRQ_NONE; /* generated by the board. */
|
|
|
|
priv = netdev_priv(dev);
|
|
|
|
boguscnt = 10;
|
|
while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
|
|
/* Acknowledge all of the current interrupt sources ASAP. */
|
|
lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
|
|
|
|
#if 0
|
|
if (ariadne_debug > 5) {
|
|
printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.",
|
|
dev->name, csr0, lance->RDP);
|
|
printk("[");
|
|
if (csr0 & INTR)
|
|
printk(" INTR");
|
|
if (csr0 & INEA)
|
|
printk(" INEA");
|
|
if (csr0 & RXON)
|
|
printk(" RXON");
|
|
if (csr0 & TXON)
|
|
printk(" TXON");
|
|
if (csr0 & TDMD)
|
|
printk(" TDMD");
|
|
if (csr0 & STOP)
|
|
printk(" STOP");
|
|
if (csr0 & STRT)
|
|
printk(" STRT");
|
|
if (csr0 & INIT)
|
|
printk(" INIT");
|
|
if (csr0 & ERR)
|
|
printk(" ERR");
|
|
if (csr0 & BABL)
|
|
printk(" BABL");
|
|
if (csr0 & CERR)
|
|
printk(" CERR");
|
|
if (csr0 & MISS)
|
|
printk(" MISS");
|
|
if (csr0 & MERR)
|
|
printk(" MERR");
|
|
if (csr0 & RINT)
|
|
printk(" RINT");
|
|
if (csr0 & TINT)
|
|
printk(" TINT");
|
|
if (csr0 & IDON)
|
|
printk(" IDON");
|
|
printk(" ]\n");
|
|
}
|
|
#endif
|
|
|
|
if (csr0 & RINT) { /* Rx interrupt */
|
|
handled = 1;
|
|
ariadne_rx(dev);
|
|
}
|
|
|
|
if (csr0 & TINT) { /* Tx-done interrupt */
|
|
int dirty_tx = priv->dirty_tx;
|
|
|
|
handled = 1;
|
|
while (dirty_tx < priv->cur_tx) {
|
|
int entry = dirty_tx % TX_RING_SIZE;
|
|
int status = lowb(priv->tx_ring[entry]->TMD1);
|
|
|
|
if (status & TF_OWN)
|
|
break; /* It still hasn't been Txed */
|
|
|
|
priv->tx_ring[entry]->TMD1 &= 0xff00;
|
|
|
|
if (status & TF_ERR) {
|
|
/* There was an major error, log it. */
|
|
int err_status = priv->tx_ring[entry]->TMD3;
|
|
priv->stats.tx_errors++;
|
|
if (err_status & EF_RTRY)
|
|
priv->stats.tx_aborted_errors++;
|
|
if (err_status & EF_LCAR)
|
|
priv->stats.tx_carrier_errors++;
|
|
if (err_status & EF_LCOL)
|
|
priv->stats.tx_window_errors++;
|
|
if (err_status & EF_UFLO) {
|
|
/* Ackk! On FIFO errors the Tx unit is turned off! */
|
|
priv->stats.tx_fifo_errors++;
|
|
/* Remove this verbosity later! */
|
|
printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n",
|
|
dev->name, csr0);
|
|
/* Restart the chip. */
|
|
lance->RDP = STRT;
|
|
}
|
|
} else {
|
|
if (status & (TF_MORE|TF_ONE))
|
|
priv->stats.collisions++;
|
|
priv->stats.tx_packets++;
|
|
}
|
|
dirty_tx++;
|
|
}
|
|
|
|
#ifndef final_version
|
|
if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
|
|
printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, "
|
|
"full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full);
|
|
dirty_tx += TX_RING_SIZE;
|
|
}
|
|
#endif
|
|
|
|
if (priv->tx_full && netif_queue_stopped(dev) &&
|
|
dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
|
|
/* The ring is no longer full. */
|
|
priv->tx_full = 0;
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
priv->dirty_tx = dirty_tx;
|
|
}
|
|
|
|
/* Log misc errors. */
|
|
if (csr0 & BABL) {
|
|
handled = 1;
|
|
priv->stats.tx_errors++; /* Tx babble. */
|
|
}
|
|
if (csr0 & MISS) {
|
|
handled = 1;
|
|
priv->stats.rx_errors++; /* Missed a Rx frame. */
|
|
}
|
|
if (csr0 & MERR) {
|
|
handled = 1;
|
|
printk(KERN_ERR "%s: Bus master arbitration failure, status "
|
|
"%4.4x.\n", dev->name, csr0);
|
|
/* Restart the chip. */
|
|
lance->RDP = STRT;
|
|
}
|
|
}
|
|
|
|
/* Clear any other interrupt, and set interrupt enable. */
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON;
|
|
|
|
#if 0
|
|
if (ariadne_debug > 4)
|
|
printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
|
|
lance->RAP, lance->RDP);
|
|
#endif
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
|
|
static void ariadne_tx_timeout(struct net_device *dev)
|
|
{
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
|
|
printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n",
|
|
dev->name, lance->RDP);
|
|
ariadne_reset(dev);
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
|
|
static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ariadne_private *priv = netdev_priv(dev);
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
int entry;
|
|
unsigned long flags;
|
|
int len = skb->len;
|
|
|
|
#if 0
|
|
if (ariadne_debug > 3) {
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n",
|
|
dev->name, lance->RDP);
|
|
lance->RDP = 0x0000;
|
|
}
|
|
#endif
|
|
|
|
/* FIXME: is the 79C960 new enough to do its own padding right ? */
|
|
if (skb->len < ETH_ZLEN)
|
|
{
|
|
if (skb_padto(skb, ETH_ZLEN))
|
|
return 0;
|
|
len = ETH_ZLEN;
|
|
}
|
|
|
|
/* Fill in a Tx ring entry */
|
|
|
|
#if 0
|
|
{
|
|
DECLARE_MAC_BUF(mac);
|
|
DECLARE_MAC_BUF(mac2);
|
|
|
|
printk(KERN_DEBUG "TX pkt type 0x%04x from %s to %s "
|
|
" data 0x%08x len %d\n",
|
|
((u_short *)skb->data)[6],
|
|
print_mac(mac, ((const u8 *)skb->data)+6),
|
|
print_mac(mac, (const u8 *)skb->data),
|
|
(int)skb->data, (int)skb->len);
|
|
}
|
|
#endif
|
|
|
|
local_irq_save(flags);
|
|
|
|
entry = priv->cur_tx % TX_RING_SIZE;
|
|
|
|
/* Caution: the write order is important here, set the base address with
|
|
the "ownership" bits last. */
|
|
|
|
priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
|
|
priv->tx_ring[entry]->TMD3 = 0x0000;
|
|
memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len);
|
|
|
|
#if 0
|
|
{
|
|
int i, len;
|
|
|
|
len = skb->len > 64 ? 64 : skb->len;
|
|
len >>= 1;
|
|
for (i = 0; i < len; i += 8) {
|
|
int j;
|
|
printk(KERN_DEBUG "%04x:", i);
|
|
for (j = 0; (j < 8) && ((i+j) < len); j++) {
|
|
if (!(j & 1))
|
|
printk(" ");
|
|
printk("%04x", priv->tx_buff[entry][i+j]);
|
|
}
|
|
printk("\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
priv->cur_tx++;
|
|
if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
|
|
|
|
#if 0
|
|
printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and "
|
|
"dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx);
|
|
#endif
|
|
|
|
priv->cur_tx -= TX_RING_SIZE;
|
|
priv->dirty_tx -= TX_RING_SIZE;
|
|
}
|
|
priv->stats.tx_bytes += len;
|
|
|
|
/* Trigger an immediate send poll. */
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = INEA|TDMD;
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) {
|
|
netif_stop_queue(dev);
|
|
priv->tx_full = 1;
|
|
}
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ariadne_rx(struct net_device *dev)
|
|
{
|
|
struct ariadne_private *priv = netdev_priv(dev);
|
|
int entry = priv->cur_rx % RX_RING_SIZE;
|
|
int i;
|
|
|
|
/* If we own the next entry, it's a new packet. Send it up. */
|
|
while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
|
|
int status = lowb(priv->rx_ring[entry]->RMD1);
|
|
|
|
if (status != (RF_STP|RF_ENP)) { /* There was an error. */
|
|
/* There is a tricky error noted by John Murphy,
|
|
<murf@perftech.com> to Russ Nelson: Even with full-sized
|
|
buffers it's possible for a jabber packet to use two
|
|
buffers, with only the last correctly noting the error. */
|
|
if (status & RF_ENP)
|
|
/* Only count a general error at the end of a packet.*/
|
|
priv->stats.rx_errors++;
|
|
if (status & RF_FRAM)
|
|
priv->stats.rx_frame_errors++;
|
|
if (status & RF_OFLO)
|
|
priv->stats.rx_over_errors++;
|
|
if (status & RF_CRC)
|
|
priv->stats.rx_crc_errors++;
|
|
if (status & RF_BUFF)
|
|
priv->stats.rx_fifo_errors++;
|
|
priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
|
|
} else {
|
|
/* Malloc up new buffer, compatible with net-3. */
|
|
short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
|
|
struct sk_buff *skb;
|
|
|
|
skb = dev_alloc_skb(pkt_len+2);
|
|
if (skb == NULL) {
|
|
printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n",
|
|
dev->name);
|
|
for (i = 0; i < RX_RING_SIZE; i++)
|
|
if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
|
|
break;
|
|
|
|
if (i > RX_RING_SIZE-2) {
|
|
priv->stats.rx_dropped++;
|
|
priv->rx_ring[entry]->RMD1 |= RF_OWN;
|
|
priv->cur_rx++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
|
|
skb_reserve(skb,2); /* 16 byte align */
|
|
skb_put(skb,pkt_len); /* Make room */
|
|
skb_copy_to_linear_data(skb, (char *)priv->rx_buff[entry], pkt_len);
|
|
skb->protocol=eth_type_trans(skb,dev);
|
|
#if 0
|
|
{
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
printk(KERN_DEBUG "RX pkt type 0x%04x from ",
|
|
((u_short *)skb->data)[6]);
|
|
{
|
|
u_char *ptr = &((u_char *)skb->data)[6];
|
|
printk("%s", print_mac(mac, ptr));
|
|
}
|
|
printk(" to ");
|
|
{
|
|
u_char *ptr = (u_char *)skb->data;
|
|
printk("%s", print_mac(mac, ptr));
|
|
}
|
|
printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
|
|
}
|
|
#endif
|
|
|
|
netif_rx(skb);
|
|
dev->last_rx = jiffies;
|
|
priv->stats.rx_packets++;
|
|
priv->stats.rx_bytes += pkt_len;
|
|
}
|
|
|
|
priv->rx_ring[entry]->RMD1 |= RF_OWN;
|
|
entry = (++priv->cur_rx) % RX_RING_SIZE;
|
|
}
|
|
|
|
priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
|
|
|
|
/* We should check that at least two ring entries are free. If not,
|
|
we should free one and mark stats->rx_dropped++. */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct net_device_stats *ariadne_get_stats(struct net_device *dev)
|
|
{
|
|
struct ariadne_private *priv = netdev_priv(dev);
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
short saved_addr;
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
saved_addr = lance->RAP;
|
|
lance->RAP = CSR112; /* Missed Frame Count */
|
|
priv->stats.rx_missed_errors = swapw(lance->RDP);
|
|
lance->RAP = saved_addr;
|
|
local_irq_restore(flags);
|
|
|
|
return &priv->stats;
|
|
}
|
|
|
|
|
|
/* Set or clear the multicast filter for this adaptor.
|
|
num_addrs == -1 Promiscuous mode, receive all packets
|
|
num_addrs == 0 Normal mode, clear multicast list
|
|
num_addrs > 0 Multicast mode, receive normal and MC packets, and do
|
|
best-effort filtering.
|
|
*/
|
|
static void set_multicast_list(struct net_device *dev)
|
|
{
|
|
volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
|
|
|
|
if (!netif_running(dev))
|
|
return;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* We take the simple way out and always enable promiscuous mode. */
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = STOP; /* Temporarily stop the lance. */
|
|
ariadne_init_ring(dev);
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
lance->RAP = CSR15; /* Mode Register */
|
|
lance->RDP = PROM; /* Set promiscuous mode */
|
|
} else {
|
|
short multicast_table[4];
|
|
int num_addrs = dev->mc_count;
|
|
int i;
|
|
/* We don't use the multicast table, but rely on upper-layer filtering. */
|
|
memset(multicast_table, (num_addrs == 0) ? 0 : -1,
|
|
sizeof(multicast_table));
|
|
for (i = 0; i < 4; i++) {
|
|
lance->RAP = CSR8+(i<<8); /* Logical Address Filter */
|
|
lance->RDP = swapw(multicast_table[i]);
|
|
}
|
|
lance->RAP = CSR15; /* Mode Register */
|
|
lance->RDP = 0x0000; /* Unset promiscuous mode */
|
|
}
|
|
|
|
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
|
|
lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */
|
|
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
|
|
static void __devexit ariadne_remove_one(struct zorro_dev *z)
|
|
{
|
|
struct net_device *dev = zorro_get_drvdata(z);
|
|
|
|
unregister_netdev(dev);
|
|
release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960));
|
|
release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE);
|
|
free_netdev(dev);
|
|
}
|
|
|
|
static int __init ariadne_init_module(void)
|
|
{
|
|
return zorro_register_driver(&ariadne_driver);
|
|
}
|
|
|
|
static void __exit ariadne_cleanup_module(void)
|
|
{
|
|
zorro_unregister_driver(&ariadne_driver);
|
|
}
|
|
|
|
module_init(ariadne_init_module);
|
|
module_exit(ariadne_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL");
|